This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A366571 #10 Oct 14 2023 13:13:30 %S A366571 1,2,6,1,30,1,42,1,10,1,66,1,2730,1,2,3,170,1,798,1,110,3,46,1,546,1, %T A366571 2,1,870,1,14322,1,170,3,2,1,1919190,1,2,3,4510,1,1806,1,46,15,94,1, %U A366571 1326,1,22,3,530,1,798,1,290,3,118,1,56786730,1,2,3,34,5,64722 %N A366571 a(n) = denominator(Bernoulli(n, x)) / denominator(Bernoulli'(n, x)). %F A366571 a(n) = A144845(n) / A324370(n). %p A366571 seq(denom(bernoulli(n, x))/denom(diff(bernoulli(n, x), x)), n = 0..66); %o A366571 (PARI) a(n) = lcm(apply(denominator, Vec(bernpol(n))))/lcm(apply(denominator, Vec(deriv(bernpol(n))))); \\ _Michel Marcus_, Oct 14 2023 %Y A366571 Cf. A144845/A324370, A366572, A144845/A366168 (2nd derivative). %K A366571 nonn,frac %O A366571 0,2 %A A366571 _Peter Luschny_, Oct 13 2023